DTC P0201-P0204 (LUJ)
Diagnostic Instructions
DTC Descriptors
| DTC P0201 00: Cylinder 1 Injector Control
Circuit |
| DTC P0202 00: Cylinder 2 Injector Control
Circuit |
| DTC P0203 00: Cylinder 3 Injector Control
Circuit |
| DTC P0204 00: Cylinder 4 Injector Control
Circuit |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Ignition Voltage
|
P0689 00
|
P0201 00**, P0202 00**, P0203 00**, P0204 00**, P0689 00*
|
-
|
-
|
Injector 1 Control Circuit
|
P0201 00, P0300 00
|
P0201 00, P0300 00
|
P0201 00, P0300 00
|
-
|
Injector 2 Control Circuit
|
P0202 00, P0300 00
|
P0202 00, P0300 00
|
P0202 00, P0300 00
|
-
|
Injector 3 Control Circuit
|
P0203 00, P0300 00
|
P0203 00, P0300 00
|
P0203 00, P0300 00
|
-
|
Injector 4 Control Circuit
|
P0204 00, P0300 00
|
P0204 00, P0300 00
|
P0204 00, P0300 00
|
-
|
* Engine cranks but does not start. Open fuse, cranks no start
** If the condition is between the injector and the splice.
|
|
| |
Circuit/System Description
The control module enables the appropriate fuel injector pulse
for each cylinder. Ignition voltage is supplied to the fuel
injectors. The control module controls each fuel injector by
grounding the control circuit via a solid state device called a
driver. The control module monitors the status of each driver. If
the control module detects an incorrect voltage for the commanded
state of the driver, a fuel injector control circuit DTC sets.
Conditions for Running the DTC
| • |
The battery voltage is greater
than 9 V. |
| • |
These DTCs run continuously
when the above conditions are met. |
Conditions for Setting the DTC
| • |
The control module detects an
incorrect voltage on the fuel injector control circuit.
|
| • |
The above condition is met for
5 s. |
Action Taken When the DTC Sets
DTCs P0201 00, P0202 00, P0203 00, P0204 00 are Type B DTCs.
Conditions for Clearing the DTC
DTCs P0201 00, P0202 00, P0203 00, P0204 00, are Type B
DTCs.
Diagnostic Aids
| • |
The MIL indicator flashes when
there is an engine misfire. |
| • |
High resistance in the
circuits of the injectors may set a misfire DTC without setting an
injector DTC. Test the injector circuits of the affected
cylinder(s) for a high resistance if you suspect a
condition. |
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Fuel System Description
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Note: If you were sent here
from DTC P0300 00 - P0304 00 proceed to Circuit/System Testing.
| 1. |
Engine running, observe the
DTC information with a scan tool. DTCs P0201 00, P0202 00, P0203
00, or P0204 00 should not set. |
| 2. |
Operate the vehicle within the
conditions for running the DTC to verify the DTC does not reset.
You may also operate the vehicle within the conditions that you
observed from the freeze frame/failure records data. |
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
harness connector at the appropriate Q17 Fuel Injector.
|
| 2. |
Ignition ON, verify that a
test lamp illuminates between the ignition circuit terminal 1 and
ground. |
| ⇒ |
If the test lamp does not illuminate, test the
ignition circuit for a short to ground or an open/high resistance.
If the circuit tests normal and the ignition circuit fuse is open,
test or replace the appropriate Q17 Fuel Injector and replace the
fuse. |
| 3. |
Test for 2.5-3.5 V between the
K20 Engine Control Module control circuit terminal 2 and
ground. |
| ⇒ |
If less than the specified range, test the K20
Engine Control Module control circuit for a short to ground or an
open high resistance. If circuit tests normal, replace the K20
Engine Control Module. |
| ⇒ |
If greater than the specified range, test the K20
Engine Control Module control circuit for a short to voltage. If
circuit tests normal, replace the K20 Engine Control Module. |
| 4. |
Ignition OFF, connect a test
lamp between the K20 Engine Control Module control circuit terminal
2 and the ignition voltage circuit terminal 1. |
| 5. |
Engine idling, the test lamp
should flash. |
| ⇒ |
If the test lamp does not flash, test the fuel
injector circuits for a high resistance. If circuits test normal,
replace the K20 Engine Control Module. |
| 6. |
If all circuits test normal,
test or replace the appropriate Q17 Fuel Injector. |
Component Testing
Static Test
| 1. |
Ignition OFF, disconnect the
harness connector at the appropriate Q17 Fuel Injector.
|
|
Note: The engine
coolant temperature (ECT) sensor must be between 10-32°C
(50-90°F) in order for an accurate measurement.
|
| 2. |
Test for 11-14 Ω between
the appropriate Q17 Fuel Injector ignition voltage terminal 1 and
the K20 Engine Control Module control circuit terminal 2.
|
| ⇒ |
If not within the specified range, replace the
appropriate Q17 Fuel Injector. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
